Prior rehabilitation outcome studies had many weaknesses. They had: a) evaluated rehabilitation effects only in isolated subgroups, b) focused on functional ability rather than on quality of life, c) not used randomized control groups, and d) had inadequate sample sizes. Differences in methodological approaches have resulted in inconsistent findings. The lack of long-term benefits suggests that services may need to be continued at home or in subacute care settings to optimize their effectiveness. Unfortunately, prior research did not include behavioral outcomes. The potential benefits of rehabilitative care could thus not be evaluated by these studies in more meaningful detail, and they did not accurately reflect the psychosocial objectives of rehabilitation.